1. General Approach

ANS can deliver alarm events generated in EOS SCADA to designated recipients by email via SMTP. Yandex Mail is one of the SMTP services that can be used for this purpose.

Basic flow:

YANDEX MAIL ACCOUNT → APP PASSWORD → ANS SMTP SETTINGS → SCADA ALARM → EMAIL NOTIFICATION

2. Prerequisites

  • An active Yandex Mail account.
  • Email client/SMTP access enabled in Yandex Mail.
  • An App Password must be created.
  • The ANS server must be able to access the Yandex SMTP server.
  • The firewall must allow the required SMTP connection.

Yandex specifies that the relevant client access options must be enabled for clients using an application password.

3. Yandex Mail Application Password (App Password)

For a continuously running system such as ANS, using an App Password instead of the normal Yandex account password is a more secure and manageable approach.

Creation steps:

  1. Sign in to your Yandex ID account.
  2. Open the App passwords section.
  3. Select Create an app password.
  4. Select Mail as the application type.
  5. For example, name it EOS ANS SMTP.
  6. Create the password and store it securely.
  7. Use this value in the ANS Password field.

According to Yandex, a generated application password is displayed only once; if it is lost, a new application password must be created.

Security: Do not share the App Password as you would a normal account password, and never use a real password in documentation.

4. ANS SMTP Settings

The following values can be used in ANS:

Parameter Value Description
SMTP Server smtp.yandex.com Yandex Mail SMTP server.
SMTP Port 465 The port specified in Yandex's current official documentation for SSL/TLS connections.
Use SSL Enabled Encrypted SMTP connection.
Username Yandex Mail address Account used for SMTP authentication.
Password App Password Application password instead of the normal account password.
Timeout 10 ANS SMTP connection timeout.

About port 587: The previous ANS documentation specified 587 + SSL. Yandex's current official documentation recommends 465 for SSL/TLS, while 587 is described as an alternative depending on the client's connection/encryption method. Therefore, new installations should use 465 + SSL/TLS first.

5. Testing Email Delivery

  1. Check the SMTP server and port.
  2. Verify the SSL/TLS setting.
  3. Enter the Yandex Mail username.
  4. Enter the App Password in the Password field.
  5. Generate a test alarm through ANS and verify that the email is delivered.
  6. If delivery fails, check network access, SMTP authentication, and Yandex client settings.

Yandex's troubleshooting documentation recommends checking SMTP authentication and application password settings for connection and authentication problems.

6. Security and Operational Notes

  • Do not use the normal Yandex account password in ANS.
  • Use only the relevant App Password for SMTP.
  • Protect the App Password against unauthorized access.
  • If passwords are stored in configuration files, use encryption or secure secret management whenever possible.
  • Carefully configure notification groups and alarm selections to prevent excessive alarm emails.

Important: A functioning technical SMTP connection alone is not sufficient for an alarm notification system. Which alarms are sent to which users or groups must also be determined according to operational requirements.

7. Summary Configuration

YANDEX MAIL
↓
APP PASSWORD
↓
smtp.yandex.com : 465
↓
SSL/TLS + USERNAME + APP PASSWORD
↓
ANS SMTP SETTINGS
↓
SCADA ALARM → EMAIL NOTIFICATION

With this configuration, EOS SCADA ANS can use Yandex Mail as an SMTP-based email channel for alarm notifications.

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